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Isolation of Carbohydrate Carboxylic Acids from Aqueous Solutions by Reactive Extraction
Author(s) -
Hirth J.,
Bicker M.,
Vogel H.
Publication year - 2003
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.200390099
Subject(s) - chemistry , aqueous solution , extraction (chemistry) , carbohydrate , coalescence (physics) , organic chemistry , chromatography , fermentation , astrobiology , physics
Until now the separation of carbohydrate carboxylic acids from aqueous solutions obtained by reaction or fermentation represents an economic barrier. Hydroxycarboxylic acids are poorly extractable with conventional solvents. To reach good extraction results, i.e., high distribution ratios and selectivities with respect to the resource, combined, highly synergistic extractant systems were used. Hydroxycarboxylic acids, which have been extracted with trialkylamines, primarily with tri‐ n ‐octylamine, can frequently show a poor coalescence behavior and form stable emulsions. Thus, different methods to accelerate the separation of phases were investigated.